Definition of Alt key in English:

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Alt key

Pronunciation: /ˈɔːlt kiː/

noun

Computing
A key on a keyboard which, when pressed simultaneously with another key, gives the latter an alternative function.
Example sentences
  • Simply press the Alt key on your keyboard and use your mouse to click on any word or name, and Answers.com will provide you with the necessary information.
  • Ok, press and hold the Control Key… now, the Alt key… now, tap the Delete key.
  • Should the Taskbar not be visible, with the Alt key pressed, repeatedly press the Tab key until Internet Explorer is the active window, you should then be able to close it.

Origin

Late 20th century: abbreviation of alt(ernative) key.

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